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I have a 2006 M5 V10, I had a hose clamp come break (just a support clamp) but one end of it went into the fan so it sounded like a kids bicycle with a card in the spokes. I found the problem and removed it, but now my fan is making all sorts of racket and it continues while the fan runs when engine is off. My question is this- can a person just replace the fan blade? Can a person just buy a blade or is this assembly all one piece?